Thermostatic head



FIG. 1 is a front, bottom, right-hand side perspective view of a thermostatic head comprising a new, original and ornamental design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a right-hand side view thereof. 

CLAIM The ornamental design for thermostatic head, substantially as shown. 